Chapter 16, Problem 8MI

### Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

Chapter
Section

### Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

# If you were to hike southeast from Auto Camp on McDonald Creek up Avalanche Creek to the base of Sperry Glacier, how far would you travel, and how much elevation change would you encounter?

To determine

If you were to hike southeast from Auto Camp on McDonald Creek up Avalanche Creek to the base of Sperry Glacier, how far would you travel, and how much elevation change would you encounter?

Explanation

To find the distance travelled:

Given info:

Scale: 1:125000

Contour interval = 100 ft

Assume that the distance on topographic map as 2 inches using a measuring scale.

Since the scale is a ratio (and looks like this 1:100,000), multiply the map units by the number following the colon.

Formula to find actual distance on ground is as follows:

DistanceÂ onÂ groundÂ =Â MapÂ scaleÃ—DistanceÂ onÂ mapÂ

Substitute map scale value as 125000 inches and obtained distance on map as 2 inches.

DistanceÂ onÂ groundÂ =Â 125,000Â inchesÃ—2inches=250,000Â inches

IfÂ 1Â mileÂ =Â 63360Â inches,

To convert inch to mile, divide 250,000 inches with 63360 inches to obtain the distance in miles.

25000063360=3.945Â miles

Therefore, the distance between Auto camp and base of Sperry glacier is 3.9 miles.

To find elevation change:

Auto Camp is at about 3,400 ft. and the base of Sperry Glacier is about 7,000 feet above the sea level

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